Introduction: primatological perspectives on language / Barbara J. King -- Viewed from up close: monkeys, apes, and language-origins theories / Barbara J. King -- Primate social organization, gestural repertoire size, and communication dynamics: a comparative study of macaques / Dario Maestripieri -- An empiricist view of language evolution and development / Charles T. Snowdon -- Ape language: between a rock and a hard place / Sue Savage-Rumbaugh -- Language evolution and expansions of multiple neurological processing areas / Kathleen R. Gibson, Stephen Jessee -- The game of the name: continuity and discontinuity in language origins / Iain Davidson -- Children's transition to language: a human model for development of the vocal repertoire in extant and ancestral primate species? / Lorraine McCune -- Motivation, conventionalization, and arbitrariness in the origin of language / Robbins Burling -- The invention and ritualization of language / Sherman Wilcox